Early connection migration in QUIC.

net/quic/quic_connection.h

Index: net/quic/quic_connection.h
diff --git a/net/quic/quic_connection.h b/net/quic/quic_connection.h
index f82d04af19cf45052788377b69ce58b087916bfa..bd83e51d928c03a7327ab40a4775f28c52855224 100644
--- a/net/quic/quic_connection.h
+++ b/net/quic/quic_connection.h
@@ -132,6 +132,9 @@ class NET_EXPORT_PRIVATE QuicConnectionVisitorInterface {
   // Called when the connection receives a packet from a migrated client.
   virtual void OnConnectionMigration() = 0;
 
+  // Called when the the peer seems unreachable over the current network.
+  virtual void MaybeMigrateConnection() = 0;

[Ryan Hamilton, 2016/02/02 04:19:59]

I think OnPeerUnreachable() (or some such) would be a better name for this
method.

[Ryan Hamilton, 2016/02/02 04:19:59]

Looks like this is basically shared code and should probably be landed in an
internal change first.

[Jana, 2016/02/02 06:53:53]

Addressing in shared code.

[Jana, 2016/02/02 06:53:53]

Yes, I wanted to have this CL out for context. 

+
   // Called to ask if the visitor wants to schedule write resumption as it both
   // has pending data to write, and is able to write (e.g. based on flow control
   // limits).